I care more about the goal (or goals) each team behind a language sets then the actual list of features. Though not clearly stated on
kotlinlang.org, I’ve got the feeling Kotlin really aims for productivity more than anything. Where productivity can for instance lead to decisions that make the code more concise, conciseness is not a goal in itself. Scala on the other hand tries to be a fully functional and object oriented programming language and has made conciseness a goal leading to less readable code.